بررسي تاثير پارامترهاي مختلف آبكاري بر ساختار و شكل پوشش هاي قلع

EFFECT OF AGITATION ON MORPHOLOGY OF TIN PLATE FROM ACID BATHS

The corrosion resistance of tin in foodstaffs and its non-toxicity results in extensive use of tin in packaging of foods and tin plate cans. Among different types of bath of tin electroplating, sulfate bath with respect to throwing power, cathodic efficiency and easy working is the best. In this research by selecting sulfate bath, and changing current density and agitation, the morphology and structure of coatings have been studied. It was found that the morphology of coating is related to current density and agitation, which in low current densities, the structure of grains is equiaxial and flattened, but in high current densities dendritic structure has been observed . XRD analysis also illustrates that the growth direction of crystals drastically depends on current density.